JPS6043673A - Mechanism for preventing toner sticking - Google Patents

Mechanism for preventing toner sticking

Info

Publication number
JPS6043673A
JPS6043673A JP15095883A JP15095883A JPS6043673A JP S6043673 A JPS6043673 A JP S6043673A JP 15095883 A JP15095883 A JP 15095883A JP 15095883 A JP15095883 A JP 15095883A JP S6043673 A JPS6043673 A JP S6043673A
Authority
JP
Japan
Prior art keywords
toner
contact part
sleeve
doctor blade
item
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15095883A
Other languages
Japanese (ja)
Inventor
Takeshi Saito
健 斉藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP15095883A priority Critical patent/JPS6043673A/en
Publication of JPS6043673A publication Critical patent/JPS6043673A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0896Arrangements or disposition of the complete developer unit or parts thereof not provided for by groups G03G15/08 - G03G15/0894

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To obtain stably an always satisfactory image by the constitution in which a toner sticking to the contact part between a toner carrying body and a toner processing member is forcibly removed by a scraping member actuated when a toner vesel is exchanged. CONSTITUTION:A toner cartridge 1 is pressed and fixed by the short side part 3c of a protective cover 3 which is freely turnable around a shaft 3a. The cartridge 1 can be exchanged when the cover 3 is turned in the direction of a blanked arrow. The toner is liable to stick near the contact part P between a doctor blade 7 and a sleve 6 but the top end 8a of a scraping member 8 advances along the surface 7a if the blade 7 and passes through the contact part P when the cartridge 1 is exchanged. The forcible scraping away of the toner T sticking to said contact part is eventually resulted. The blade surface 7a is thus maintained smooth at all times and the thin toner layer adequated fro developing is stably formed.

Description

【発明の詳細な説明】 技術分野 本発明は、現像装置に於けるトナー固社防止観構に関す
るもので、より詳細には、1〜ナ一層厚規制部材として
のドクタブレードと共に使用するのに好適なトナー同社
防止機構に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a toner build-up prevention mechanism in a developing device, and more particularly, to a device suitable for use with a doctor blade as a thickness regulating member. This is related to the toner company's prevention mechanism.

従来技術 −fi、2に、電子写真複写機等の1成分現像剤を用い
た現像方法に於いては、現像剤としてのトシーを均一に
+vJ TA化し電荷を十分に付与して現像に供する必
要がある。その具体的な手段どして、弾性ブレードや磁
性体からなる抑圧部材をトナー担持体としてのスリーブ
表面に当接させてトナーの層厚を規制し、1−ナー蒲層
をJ’Jると同詩に必要な1f1奈帯電電荷を付与する
方法がよく知られている。
Prior art - fi, 2, in the development method using a one-component developer such as in an electrophotographic copying machine, it is necessary to uniformly convert the toner sheet as a developer into +vJ TA and apply a sufficient charge to it for development. There is. Specifically, the thickness of the toner layer is regulated by bringing a suppressing member made of an elastic blade or a magnetic material into contact with the surface of the sleeve as a toner carrier, and the 1-toner layer is J'J. A method of imparting the 1f1na charge necessary for the poem is well known.

この場合、抑圧部材のスリーブと当接づる接点近傍に於
いて1〜ナーか固着し易く、これによりトナーの円滑な
移動が妨げられてコピー画像にトナーの存在しない所謂
白帯や白筋が発生したり、スリーブ上に1−ナーフィル
ムが生じ1−ナー7J層を供給ずべき感光体との電界強
度が低下1ノて画@濃度不良が引き起こされたりする。
In this case, the toner tends to stick near the contact point where the suppressing member contacts the sleeve, and this prevents the smooth movement of the toner, resulting in so-called white bands or white streaks where no toner is present in the copied image. Otherwise, a 1-toner film is formed on the sleeve, and the electric field strength with the photoreceptor to which the 1-toner 7J layer is to be applied is reduced, causing a 1-toner image@density defect.

又、この4Wなトナー固着は、抑圧部材だけでなく、現
像に]jξされずスリーブ上に残存する[・ナーを剥随
させるスフ(ノーパ等の部材にも発生し、この場合も同
様に画像品質に悪影響を及ぼす。
Additionally, this 4W toner fixation occurs not only on the suppressing member, but also on members such as a no-pah, which causes the toner to peel off and remains on the sleeve without being developed. It has a negative impact on quality.

上述の如く画像品質に悪影響を及ぼすトナー固着を防止
する方法としては、ドクタブレードやスクレーパ等の1
−ナー処迎部材を振動させる方法等が従来から採用され
ているが、複写機の使用環境条件が例えば温度が30℃
湿度が90%程度の高温多湿な場合には、トナー同容防
止効果が不十分となる。又、トナー処理部材表面を所定
のインターバルで定期的に別個のブレード部材によって
摺擦しトナー固着を防止する方法も提案されているが、
この場合、機構が複雑化してコストアップや故障の原因
となり、省エネルギー対策面に於いても逆効果となる。
As mentioned above, one way to prevent toner from sticking, which has a negative effect on image quality, is to use a doctor blade, scraper, etc.
- Methods such as vibrating the nurse treatment member have been adopted in the past, but the environmental conditions in which the copying machine is used are such that the temperature is 30°C.
When the humidity is high and high, such as about 90%, the toner dispersion prevention effect becomes insufficient. A method has also been proposed in which a separate blade member is periodically rubbed on the surface of the toner processing member at predetermined intervals to prevent toner from sticking.
In this case, the mechanism becomes complicated, leading to increased costs and failures, and is also counterproductive in terms of energy saving measures.

目 的 本発明は、以上の点に鑑みて成されたものであって、簡
単な機構により効率よく確実にトナー固着を防止でき良
好な画像品質を安定して得る事に寄与するトナー固着防
止機構を提供する事を目的とする。
Purpose The present invention has been made in view of the above points, and provides a toner sticking prevention mechanism that efficiently and reliably prevents toner sticking with a simple mechanism and contributes to stably obtaining good image quality. The purpose is to provide.

構成 以下、本発明の構成について、具体的な実流例に基づき
詳細に説明する。第1図は本発明の1実施例としての電
子写真複写機の現像装置周辺を示した模式的断面図であ
る。第1図に於いて、容器ごど交〕灸し、て1〜ナーを
?ill袷する1〜ナーカー1〜リツジ1が所定の股買
台2上にレットされている。このトナーカー1〜リツジ
1はぞの周イr1部1af!−JJ、!f*スリーブの
保護カバー3により押圧され固定されている。保護カバ
ー31才略り字状に形成されぞの4Fi i 釉3 a
を介して回動自在に支承されて83す、長手部3bを白
抜矢印方向に回動させるとり、−7手?11i3Cによ
るトナーカー1−リッジ1の周縁部′I aの押圧状f
ポか解除され、空1〜ナーノJ−1〜リッジ1を新し、
いカートリッジと交検ずろ事ができる。尚、本例で使用
ずろトナーどし・ては、樹脂中に磁性粉を混合さぜた所
H”il 1成分高抵抗磁性[・チー14’i好適に使
用される。
Configuration Hereinafter, the configuration of the present invention will be explained in detail based on a specific example of actual flow. FIG. 1 is a schematic sectional view showing the vicinity of a developing device of an electrophotographic copying machine as an embodiment of the present invention. In Figure 1, moxibustion is carried out using containers, and te 1~na? 1 to 1 to 1 to 1 to 1 are placed on a predetermined shopping table 2. This toner car 1~ritsuji 1 is the first part 1af! -JJ,! It is pressed and fixed by the protective cover 3 of the f* sleeve. Protective cover 31 years old Formed in an abbreviated shape 4Fi i Glaze 3a
If the longitudinal part 3b is rotatably supported through the frame 83, and the longitudinal part 3b is rotated in the direction of the white arrow, -7? Toner car 1 by 11i3C - Pressure shape f of peripheral edge part 'I a of ridge 1
Poka has been released and Sky 1 ~ Nano J-1 ~ Ridge 1 has been updated,
Can be used with different cartridges. The toner used in this example is preferably one-component high-resistance magnetic toner in which magnetic powder is mixed into a resin.

1〜ナーカートリッジ1の下方には?lii給用トナー
を貯留する小ツバ・1が形成されている。このホッパ4
内には送り根5がI、li 5 Bを中心に回動可能に
段けられており、L・ナーカートリッジ1から落下し貯
留されているトナーを適門づつホッパ4の出口4a側へ
搬送する。そして、ホッパ出口4aの外側には1−ナー
担持体としてのスリーブ6が回転自在に支承されており
、その周面に適ωづつトナーが補給される。本例のスリ
ーブ6は、非磁性体の例えばステンレス等により円筒状
に形成され、内部に円柱状の永久磁石(不図示)を備え
ており、共に矢印方向に夫々所定の速度で回転されトナ
ーをその局面に担持して搬送する。
1 ~ Below the cartridge 1? A small flange 1 is formed for storing toner to be supplied. This hopper 4
Inside, feed roots 5 are arranged so as to be rotatable around I and li 5 B, and convey the toner that has fallen from the L/toner cartridge 1 and is stored one by one to the exit 4a side of the hopper 4. do. A sleeve 6 serving as a 1-toner carrier is rotatably supported outside the hopper outlet 4a, and toner is replenished onto the circumferential surface of the sleeve 6 in an appropriate amount ω. The sleeve 6 of this example is made of a non-magnetic material such as stainless steel and has a cylindrical shape, and is equipped with a cylindrical permanent magnet (not shown) inside.The sleeve 6 is rotated at a predetermined speed in the direction of the arrow to collect the toner. It is carried on the surface and transported.

スリーブ6の周面近傍で、その回転方向に於けるトナー
補給部位Sの下流側には、スリーブ6周面上に担持され
搬送されてくるトナーの層厚を規制しトナー薄層を形成
するドクタブレード7が配設されている。本例のドクタ
ブレード7は、非磁性弾性体で形成されており、例えば
プラスチック。
Near the circumferential surface of the sleeve 6 and downstream of the toner replenishing portion S in the rotational direction thereof, there is a doctor that regulates the layer thickness of the toner carried and conveyed on the circumferential surface of the sleeve 6 to form a thin toner layer. A blade 7 is provided. The doctor blade 7 of this example is made of a non-magnetic elastic material, such as plastic.

リン高調、ステンレス、ゴム等の単−若しくはこれらの
複合材料が好適である。この場合、弾性体ドクタブレー
ド7の腹部でスリーブ6周面を適正な圧力で押圧しブレ
ード7とスリーブ6周面間を通過するトナー嶽を規制す
る事により、層厚が均−なトナー+WIJが形成される
。尚、ドクタブレード7の材料としては、非磁性弾性体
に限らず、罷性弾性体材料を用いてもよい。
A single material such as phosphorescent material, stainless steel, rubber, or a composite material thereof is suitable. In this case, by pressing the circumferential surface of the sleeve 6 with an appropriate pressure with the abdomen of the elastic doctor blade 7 and regulating the amount of toner passing between the blade 7 and the circumferential surface of the sleeve 6, toner + WIJ with an even layer thickness can be produced. It is formed. Note that the material of the doctor blade 7 is not limited to a non-magnetic elastic material, and a striated elastic material may also be used.

而して、ドクタブレード7の上方には、掻取部材8が、
その1端を前述した保護カバー3の艮手部3bの所定位
置に設けられた軸8aによりその周りに回動自在に支承
され、配設されている。そして、その自由端8bは、ド
クタブレード7のスリーブ6を押圧する側の表面7a上
でその抑圧部Pよりブレード支持部7bに近い位置に接
触している。保護カバー3を白抜矢印方向に回動させる
と、第2(a)図に示される如く、掻取部材8の先端8
bがドクタブレード表面7a上を摺動し、最4S的には
第2(b)図に示される如く、ドクタブレード7がスリ
ーブ6周面を押圧する押圧部Pを貫通する。これにより
、ドクタブレード表面7aの抑圧部近傍に固着し始めた
トナーTを捕取除去でき、固化すると除去が困蛙となる
固着トナーの発生を未然に防ぐことができる。即ち、略
定期的に行なわれるトナーカートリッジ1の交換の都度
、保護カバー3が白抜矢印方向に回動され上述の掻取部
材8の掻取動作が実施される為、固着1ヘナーの発生・
成長を阻止する事ができる。又、例え不用意に固着トナ
ーを発生させたとしても、第2(b)図に示される如く
ドクタブレード7自体の弾性に抗して強制的に掻取部材
8の先端8bを押圧部Pを通過させて前進させる為、既
に発生した同容トナーも略完全に除去出来る。
A scraping member 8 is disposed above the doctor blade 7.
One end of the protective cover 3 is rotatably supported by a shaft 8a provided at a predetermined position of the handle portion 3b of the protective cover 3. The free end 8b is in contact with the blade supporting portion 7b than the suppressing portion P on the surface 7a of the doctor blade 7 on the side that presses the sleeve 6. When the protective cover 3 is rotated in the direction of the white arrow, the tip 8 of the scraping member 8 is removed as shown in FIG. 2(a).
b slides on the doctor blade surface 7a, and most importantly, as shown in FIG. 2(b), the doctor blade 7 passes through the pressing portion P that presses the circumferential surface of the sleeve 6. This makes it possible to capture and remove the toner T that has begun to adhere to the vicinity of the suppressing portion of the doctor blade surface 7a, and to prevent the occurrence of adhered toner that becomes difficult to remove once solidified. That is, each time the toner cartridge 1 is replaced, which is done almost regularly, the protective cover 3 is rotated in the direction of the white arrow and the above-mentioned scraping operation of the scraping member 8 is performed, which prevents the occurrence of stuck 1 hener.
growth can be inhibited. Furthermore, even if fixed toner is generated inadvertently, the tip 8b of the scraping member 8 can be forcibly pressed against the pressing part P against the elasticity of the doctor blade 7 itself, as shown in FIG. 2(b). Since the toner is passed through and moved forward, the toner that has already been generated can be almost completely removed.

スリーブ6周面でトナー補給部位Sの略反対側に於いて
は、適数個のローラ9a間に回動自在に張架された無端
状の感光体ベルト9が配設されており、この表面に回転
駆動されるスリーブ6が転勤接触し、スリーブ6周面に
担持され搬送されてくるトナー薄層が感光体ベルト9表
面に供給される。感光体ベルト9はベルト状の導電性基
体上に光導電性物質からなる感光層が形成されており、
矢印方向に低速駆動される間に、その表面に所定の極性
で一様帯電がなされ像露光がなされて静電潜像が形成さ
れた後、スリーブ5との転接位置D(現像位置)に到達
し、ここで上記トナー薄層の供給を受け静電潜像が可?
J!血化される。
An endless photoreceptor belt 9 rotatably stretched between an appropriate number of rollers 9a is disposed on the circumferential surface of the sleeve 6 on the opposite side of the toner replenishment area S. The sleeve 6, which is rotationally driven, comes into contact with the sleeve 6, and the thin layer of toner carried and carried on the circumferential surface of the sleeve 6 is supplied to the surface of the photoreceptor belt 9. The photoreceptor belt 9 has a photosensitive layer made of a photoconductive substance formed on a belt-shaped conductive substrate.
While being driven at a low speed in the direction of the arrow, its surface is uniformly charged with a predetermined polarity and imagewise exposed to form an electrostatic latent image, and then it reaches the rolling contact position D (development position) with the sleeve 5. At this point, the electrostatic latent image is formed by being supplied with the above-mentioned toner thin layer.
J! It becomes blood.

以上の如くイ笥成された本実施例の動作について、jス
下に説明する。
The operation of this embodiment constructed as described above will be explained below.

トナーカートリッジ1からホッパ3内に落下した磁性(
〜ナーは、送り板5の回転により出口4aからスリーブ
6周面に近傍するトナー補給部Sに適ωづつ搬送される
。補給部Sに於いては、回転するスリーブ6周面上に内
股された永久磁石のri1力等により磁性トナーが適ω
づつ(’J’ Mし、スリーブ6の回転と共に下流側の
ドクタブレード7の押圧部Pまで搬送される。押圧部P
では、ドククブレ−147の押圧力によりスリーブ6表
面に担持されたトナーのり厚が規制されトナー薄層が形
成されろ。又、スリーブ6とドクタブレード7間に挟圧
される間に厚1奈帯蹴作用により現■に必要な電荷が付
与される。必要な電荷が付与された現m+に好適な1〜
ナー訪−はスリーブ6の回転ど共に感光体ベルト9ど転
接する現伐! Ifk d DまでIh2送され、ここ
で静電潜像が形成された感光体ベルト9表面に供給され
、静電潜像を可?R像化する。現像に供されずスリーブ
6表面上に残存するトナーは、スリーブ6の回転と共に
再びトナー補給部位Sに戻り、新たな現像プロセスに供
される。
The magnetic material (
~The toner is conveyed from the outlet 4a to the toner replenishing part S near the circumferential surface of the sleeve 6 by an appropriate amount ω by the rotation of the feed plate 5. In the replenishment section S, the magnetic toner is properly distributed by the ri1 force of a permanent magnet placed on the circumferential surface of the rotating sleeve 6.
As the sleeve 6 rotates, it is conveyed to the pressure part P of the doctor blade 7 on the downstream side.Press part P
Then, the thickness of the toner carried on the surface of the sleeve 6 is regulated by the pressing force of the doku-kub breaker 147, and a thin toner layer is formed. Further, while the sleeve 6 is being pressed between the sleeve 6 and the doctor blade 7, a necessary electric charge is applied to the sleeve 6 due to the kicking action. 1~ suitable for the current m+ given the necessary charge
When the sleeve 6 rotates, the photoreceptor belt 9 comes into contact with it! It is sent Ih2 to Ifk d D, where it is supplied to the surface of the photoreceptor belt 9 on which the electrostatic latent image is formed, and the electrostatic latent image is formed. Create an R image. The toner remaining on the surface of the sleeve 6 without being subjected to development returns to the toner replenishing site S as the sleeve 6 rotates and is subjected to a new development process.

以上の如き現像プロセスが繰り返される内に、ドクタブ
レード表面7aの押圧部P近傍に於いて1〜ナーの固着
が発生し易くなる。特に、高温多湿な環境条件下やホッ
パ4内のトナー残口が少ない場合等に発生し易く、本願
発明者が実験により確認したところ、コピー用紙のA4
サイズ換算で約2 、000枚のコピーを実施した時点
で発生した。
As the above-described development process is repeated, sticking of 1 to ner tends to occur near the pressing portion P of the doctor blade surface 7a. This phenomenon is particularly likely to occur under hot and humid environmental conditions or when there is little toner remaining in the hopper 4, and the inventor of the present invention confirmed through experiments that copy paper of A4
This occurred when approximately 2,000 copies had been made in terms of size.

ところで、本例で使用するトナーカートリッジ1内には
、約1,000枚(A4サイズ換鐘)分のコピーが可能
な1〜ナー帛が充填されており、空になるごとにトナー
カートリッジ1か交換される。この場合、所定の解除機
4Rに治って、複写機本体を、感光体ベルト9等を含む
上部側と、上述したトナーホッパ4やスリーブ6とその
周辺部品からなる現像装置等を含む下部側に、あたかも
゛ワニロ状に分割する。この後、第3(a)図に示され
る如く保護カバー3を白抜矢印の方向に回動すると、第
3(b)図に示されろ如く保t→カバー短手部3bによ
るトナーカー1−リッジ周縁部1aの押えが解除され、
空カートリッジ1を新しいカートリッジに交換する事が
できる。この時、保護カバー3の回動操作開始に伴い、
これに1端を回転目tiに支承されている掻取部材8の
先端8bbX第2(a)図に示される如くドクタブレー
ド表面7a上を1g動し、回動操1r完了詩点ては?J
2(b)図に示される如く先端8bが抑圧部Pのスリー
ブ6とドクタブレード7間を通過して前進し柊っている
。従って、ドクタブレード表面7aの抑圧部P近f力に
発生した固着トナーT乃至は固着しががったトナーは、
捕取部材先端81)の強制的な掻取効果にまり略完全に
ドクタブレード表面7aがら除去される。かくの如くし
て、トナーカー1〜リツジ交崩ij。
By the way, the toner cartridge 1 used in this example is filled with toner sheets 1 to 1, which are capable of making approximately 1,000 copies (A4 size replacement), and each time the toner cartridge 1 is emptied, the toner cartridge 1 is filled. be exchanged. In this case, the main body of the copying machine is separated into an upper part including the photoreceptor belt 9 and the like, and a lower part including the developing device made up of the toner hopper 4, sleeve 6, and peripheral parts thereof, etc., by a predetermined release device 4R. It's like splitting into a crocodile shape. After that, when the protective cover 3 is rotated in the direction of the white arrow as shown in FIG. 3(a), it is held as shown in FIG. 3(b). The pressure on the ridge peripheral portion 1a is released,
Empty cartridge 1 can be replaced with a new cartridge. At this time, as the rotation operation of the protective cover 3 begins,
Then, as shown in FIG. 2(a), the tip 8bb of the scraping member 8, whose one end is supported by the rotating eye ti, is moved by 1g on the doctor blade surface 7a, and the turning operation 1r is completed. J
As shown in FIG. 2(b), the tip 8b passes between the sleeve 6 of the suppressing portion P and the doctor blade 7 and moves forward. Therefore, the stuck toner T or the toner that tends to stick, generated near the f force of the suppressing portion P of the doctor blade surface 7a,
It is almost completely removed from the doctor blade surface 7a by the forced scraping effect of the catching member tip 81). In this way, Toner Car 1~Ritsuji exchange collapse ij.

即ちコピ一枚数2,000枚以下侘の適切なイ〕/ダー
バルで定期的にドククブレード表面7aの掻取りリーニ
ングを実施する事により、固着1ヘナーの発生E未然に
防止する事ができる。これにより、層厚規制に関与する
ドクタブレード表面7aが常に平滑に保たれ、現像に好
適な1〜ナ一薄層を安定して形成する事ができる。
In other words, by periodically scraping and cleaning the surface 7a of the doku blade with an appropriate a/durbar for a copy size of 2,000 copies or less, the occurrence of stuck 1-henner can be prevented. As a result, the doctor blade surface 7a, which is involved in regulating the layer thickness, is always kept smooth, and it is possible to stably form one to four thin layers suitable for development.

尚、スリーブ6上に残存する未使用トナー薄層をスリー
ブ6表面から剥離するスクレーパを設けた場合には、こ
の1!なスクレーパにもトナー固着か発生し易く、且つ
発生した固着トナーは同様に画像品質に悪影響を及ぼす
。従って、スクレーパを具備する現像装置に於いては、
スクレーパに対しても同様に保護カバー等に連動して掻
取りリーニングを施す同一構成の掻取部材を配設する事
により、より一層画像品質を向上させる事ができる。
Note that if a scraper is provided to peel off the thin layer of unused toner remaining on the sleeve 6 from the surface of the sleeve 6, this 1! Toner sticking is also likely to occur on scrapers, and the sticking toner that occurs also has a negative effect on image quality. Therefore, in a developing device equipped with a scraper,
Image quality can be further improved by disposing a scraping member of the same configuration that similarly performs scraping and leaning in conjunction with a protective cover or the like for the scraper.

又、上記実施例に於いて、保護カバー3の回動操作前に
於ける掻取部材先端8bは、必ずしもドクタブレード表
面7a上に位置される必要はなく、少くとも実質的にト
ナー固着が生じる虞のある抑圧部P近傍に於いてドクタ
ブレード表面7aと接触しておれば良い。更に、掻取部
材8が支承される部品は保護カバー3に限らず、トナー
カートリッジ1交模特に作動される任意の部材を利用す
る構成とする事ができる。
Further, in the above embodiment, the tip 8b of the scraping member before the rotation operation of the protective cover 3 does not necessarily have to be positioned on the doctor blade surface 7a, and at least substantially the toner sticks to the blade. It suffices if it comes into contact with the doctor blade surface 7a in the vicinity of the suppressing portion P where there is a possibility of it being suppressed. Further, the component on which the scraping member 8 is supported is not limited to the protective cover 3, but any component that is operated, such as one or more toner cartridges, may be used.

効 果 以上詳述した如く、本発明によれば、トナ−111持体
とトナー処理部材との当接部近傍に浦留1゛るトナーを
捕取除去する事かでき、固着トナーの発生を未然に防止
する事ができる。従って、白帯や白筋のない良好な画像
品質を安定して4する事ができる。又、本発明のトナー
固社防止槻41カはその(14成が簡単であり、従って
故障が少なく且つコスト低下に寄与する。更に、トナ−
カー1〜リツジ交操操作の動作を利用する為、自動的に
掻取りリーニングを実施できる。尚、本発明は上記の実
施例に限定されるべきものではなく、本発明の技(ti
的娃囲に於いて種々の変形が可能である事は勿論である
Effects As described in detail above, according to the present invention, it is possible to collect and remove the toner that remains in the vicinity of the contact portion between the toner holder 111 and the toner processing member, thereby preventing the generation of stuck toner. It can be prevented. Therefore, it is possible to stably achieve good image quality without white bands or streaks. In addition, the toner locking mechanism 41 of the present invention is simple to construct, thus reducing the number of failures and contributing to cost reduction.
Since the movements of Car 1 to Ritsuji manipulation are used, scraping and leaning can be performed automatically. It should be noted that the present invention should not be limited to the above embodiments, but the techniques of the present invention (ti
Of course, various modifications are possible within the scope of the target.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の1実施例を示した模式的断面図、第2
(a)図、第2 (11)図は夫々掻取部(イ8の動作
を示した説明図、第3(a)図、第3(b)図は夫々ト
ナーカートリッジ1の巷説動作を示した説明図である。 (符号の説明) 1: トナーカートリッジ 3: 保護カバー 6: スリーブ 7: ドクタブレード 8: 掻取部材 9: 感光体ベル1へ特許出願人 株
式会社 リ コ 一 代 理 人 小 橋 正 明 第2(a)I’1 7′1.−′・7−・2.・9.−、ノア。 ゛パ;″′”7 −・1. / 。 第3(O)図 第2(b)図
FIG. 1 is a schematic cross-sectional view showing one embodiment of the present invention, and FIG.
Figures (a) and 2 (11) are explanatory diagrams showing the operation of the scraping unit (a8), and Figures 3 (a) and 3 (b) respectively illustrate the conventional operation of the toner cartridge 1. (Explanation of symbols) 1: Toner cartridge 3: Protective cover 6: Sleeve 7: Doctor blade 8: Scraping member 9: Photoconductor bell 1 Patent applicant Rico Co., Ltd. Masaaki No. 2 (a) I'1 7'1.-', 7-, 2., 9.-, Noah. (b) Figure

Claims (1)

【特許請求の範囲】 1、所定径路に沿ってトナーを搬送するトナー担持体と
1−ナー処即部材との当接部近傍に於りるトナー固着を
防止するトナー固着防止m +i4に於いて、トナー補
給用交換容器の交換詩に作動される作動部材に1端を回
転自在に支承された掻取部材゛を有し、前記交換容器の
交IA lidに前記作動部+4に連動して前記1m取
部材の先嬬部が+iff記1〜ナー担持体とトナー処理
部材との間の当接部を通過して前進され前記当接部近傍
に何者している1−ナーを強制的に掻取除去する事を特
徴どするトナー同社防止機構。 2、上記第1項に於いて、前21〜ナー処理部材はトナ
ーの層厚を規制するドクタブレードである事を特徴と1
−るトナー固着防止機構。 3、上記第1項に於いて、前記トナー処理部材は現像工
程後に前記トナー担持体上に残存するトナー薄層を剥離
するスクレーパである事を特徴とするトナー同社防止機
構。 4、上記茅1項に於いて、前記作動部材は前記交換容器
の固定部材を兼ねた前記トナー担持体の保護カバーであ
る事を特徴とする]・チー固着防止機溝。 5、上記第1項に於いて、前記トナーは磁性トナーであ
り、前記掻取部材は非[11性薄板から成る事を特徴と
するトナー固着防止機格。 6、上記第2項に於いて、前記ドクタブレードはプラス
チック、リン青銅、ステンレス、ゴムの内の単−又はこ
れらを複合ざぜた材料から成る1jiil f!:部材
で形成されている事を特徴とするトナー固着防止板溝。
[Scope of Claims] 1. Toner adhesion prevention m+i4 that prevents toner adhesion in the vicinity of the contact portion between the toner carrier that conveys the toner along a predetermined path and 1- the toner treatment member; , has a scraping member whose one end is rotatably supported by an operating member that is operated when the replacement container for toner replenishment is replaced, and the scraping member is interlocked with the operating portion +4 at the intersection of the replacement container. The tip part of the 1m member is advanced through the contact part between the toner carrier and the toner processing member, and forcibly scrapes any toner that is near the contact part. The company's toner prevention mechanism is characterized by its removal. 2. In the above item 1, the former 21 to toner treatment member is a doctor blade that regulates the layer thickness of the toner.
- Toner sticking prevention mechanism. 3. The toner prevention mechanism according to item 1 above, wherein the toner processing member is a scraper that peels off a thin layer of toner remaining on the toner carrier after the development process. 4. In the above-mentioned item 1, the operating member is a protective cover for the toner carrier that also serves as a fixing member for the exchange container.] - Chi sticking prevention groove. 5. The toner sticking prevention device according to item 1 above, wherein the toner is magnetic toner, and the scraping member is made of a non-[11] thin plate. 6. In item 2 above, the doctor blade is made of one of plastic, phosphor bronze, stainless steel, and rubber, or a combination of these materials. : A toner adhesion prevention plate groove characterized by being formed of a member.
JP15095883A 1983-08-20 1983-08-20 Mechanism for preventing toner sticking Pending JPS6043673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15095883A JPS6043673A (en) 1983-08-20 1983-08-20 Mechanism for preventing toner sticking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15095883A JPS6043673A (en) 1983-08-20 1983-08-20 Mechanism for preventing toner sticking

Publications (1)

Publication Number Publication Date
JPS6043673A true JPS6043673A (en) 1985-03-08

Family

ID=15508147

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15095883A Pending JPS6043673A (en) 1983-08-20 1983-08-20 Mechanism for preventing toner sticking

Country Status (1)

Country Link
JP (1) JPS6043673A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6228778A (en) * 1985-07-31 1987-02-06 Ricoh Co Ltd Developing device
JPS62172374A (en) * 1986-01-24 1987-07-29 Konishiroku Photo Ind Co Ltd Method for forming multiple color image

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6228778A (en) * 1985-07-31 1987-02-06 Ricoh Co Ltd Developing device
JPS62172374A (en) * 1986-01-24 1987-07-29 Konishiroku Photo Ind Co Ltd Method for forming multiple color image

Similar Documents

Publication Publication Date Title
JPH06273996A (en) Image forming device
JPS58121077A (en) Electrophotographic device
JPS6043673A (en) Mechanism for preventing toner sticking
JP2004109750A (en) Image forming apparatus
JPS60114891A (en) Developing device
JP2008157992A (en) Cleaning device and image forming apparatus equipped therewith
JPH08234643A (en) Image forming machine
JPS6143767A (en) Developing device
JPH0535155A (en) Picture forming device
JP2999590B2 (en) Developing device
JP2610454B2 (en) Developing device
JPH039389A (en) Image forming device
JPS61121071A (en) Developing device
JP3768810B2 (en) Toner recovery apparatus and image forming apparatus
JPH0143721Y2 (en)
JP5958179B2 (en) Developing device and image forming apparatus
JPS61114273A (en) Image forming device
CA1115332A (en) Apparatus for cleaning photosensitive member
JPH0980886A (en) Developing device
JPH11231649A (en) Rotary developing device
JPS61286874A (en) Device and method for image formation and using method for toner container
JPH0661019B2 (en) Image forming device
JPS6126066A (en) Developing device
JP2004251940A (en) Image forming apparatus
JPH05197243A (en) Image forming device